As a three-time NASCAR Sprint Cup champion, Tony Stewart knows a thing or two about safe driving.

He also knows how to police other drivers. As NASCAR’s resident traffic cop, he has sent frequent messages to other drivers about the dangers of blocking on the track (that message usually includes a shove into the wall, or a scuffle on pit road).

And Stewart has issued more than a few tongue-lashings to disrespectful drivers.

Now he’s sending a message to unsafe, disrespectful drivers on the highways.

Asked Thursday his advice on safe driving on the highway, Stewart said:

“Yeah, the first thing, put your phone down. That’s the biggest thing,” he said. “I drove 45 minutes from home up to (Indianapolis Motor Speedway) today. The biggest problem when it comes to people being a nuisance in traffic is the fact they sit out in the left-hand lane, they’re texting, not paying attention to the fact there’s other people on the road.

“You’ve got to share the road. You have to work with the people around you. It seems like as time goes on, more and more, there’s a lot less courtesy on the highways, interstates, streets altogether. People don’t care. It shows in the driving. It shows in how traffic flows.”

Stewart said drivers should work with each other, or give and take, like NASCAR drivers do on the racetrack.

“The people that were working with each other on the interstate, that part seemed to flow better than the ones where people were in the left-hand lane on their phones, didn’t care about people trying to get by them going on their way,” Stewart said.

“To me, it’s unsafe when people are having to make daring moves on the interstate to get by people that are holding up traffic.”